Hi Hans,
Commit 61f5acea8737 ("Bluetooth: btusb: Restore QCA Rome suspend/resume fix with a "rewritten" version") applied the USB_QUIRK_RESET_RESUME to all QCA btusb devices. But it turns out that the resume problems are not caused by the QCA Rome chipset, on most platforms it resumes fine. The resume problems are actually a platform problem (likely the platform cutting all power when suspended).
The USB_QUIRK_RESET_RESUME quirk also disable runtime suspend, so by matching on usb-ids, we're causing all boards with these chips to use extra power, to fix resume problems which only happen on some boards.
This commit fixes this by applying the quirk based on DMI matching instead of on usb-ids, so that we match the platform and not the chipset.
just for the record, can we include the /sys/kernel/debug/usb/devices for that device here.
Fixes: 61f5acea8737 ("Bluetooth: btusb: Restore QCA Rome suspend/resume..") Cc: stable@vger.kernel.org Cc: Brian Norris briannorris@chromium.org Cc: Kai-Heng Feng kai.heng.feng@canonical.com Signed-off-by: Hans de Goede hdegoede@redhat.com
drivers/bluetooth/btusb.c | 26 ++++++++++++++++++++------ 1 file changed, 20 insertions(+), 6 deletions(-)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 2a55380ad730..a6023667f3b4 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -21,6 +21,7 @@
*/
+#include <linux/dmi.h> #include <linux/module.h> #include <linux/usb.h> #include <linux/usb/quirks.h> @@ -379,6 +380,22 @@ static const struct usb_device_id blacklist_table[] = { { } /* Terminating entry */ };
+/*
- The btusb build into some devices needs to be reset on resume, this is a
Actually “btusb” is a driver name. So “Bluetooth USB modules”
- problem with the platform (likely shutting off all power) not with the
- btusb chip itself. So we use a DMI list to match known broken platforms.
Here s/btusb/module/
- */
+static const struct dmi_system_id btusb_plat_needs_reset_resume_list[] = {
I prefer to use _table instead of _list. Also drop the _plat_ part since that seems obvious.
- {
/* Lenovo yoga 920 */
Use “Yoga" please.
And I would include “(QCA Rome device VID:PID)” so that we have a record of some sorts.
.matches = {DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 920”),
No DMI_EXACT_MATCH?
},- },
- {}
+};
#define BTUSB_MAX_ISOC_FRAMES 10
#define BTUSB_INTR_RUNNING 0 @@ -2945,6 +2962,9 @@ static int btusb_probe(struct usb_interface *intf, hdev->send = btusb_send_frame; hdev->notify = btusb_notify;
- if (dmi_check_system(btusb_plat_needs_reset_resume_list))
interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;#ifdef CONFIG_PM err = btusb_config_oob_wake(hdev); if (err) @@ -3031,12 +3051,6 @@ static int btusb_probe(struct usb_interface *intf, if (id->driver_info & BTUSB_QCA_ROME) { data->setup_on_usb = btusb_setup_qca; hdev->set_bdaddr = btusb_set_bdaddr_ath3012;
/* QCA Rome devices lose their updated firmware over suspend,* but the USB hub doesn't notice any status change.* explicitly request a device reset on resume.*/interface_to_usbdev(intf)->quirks |= USB_QUIRK_RESET_RESUME;
It is all cosmetic. So otherwise this looks good.
Regards
Marcel